package com.freeBox;

import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

public class Filter implements HandlerInterceptor {
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        HttpSession session = request.getSession() ;
        Object usr = session.getAttribute("userlogin") ;
        if (usr!=null)
            return  true ;
        request.setAttribute("msg" , "请先登录");
        request.getRequestDispatcher("/").forward(request , response);
        return false ;
    }
}

